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Old 14th March 2005, 11:22 AM   #1
dhole is offline dhole  United Kingdom
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Default variac question

Hi People

I just bought a variac for my audio projetcs. The only thing being I dont think it will be too usefull. I have bought a claude Lyons duratrak 8A 2KVA. I did want to use it to bring up my aleph amps. Only thin is it only has a single set of outputs. I cant simpulate the twin output toroidals I will use for the alephs. Could anyone advise as to what type of variac I need.
regards
dave
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Old 14th March 2005, 11:41 AM   #2
dhole is offline dhole  United Kingdom
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oh yeah I'm in the uk ....
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Old 14th March 2005, 12:21 PM   #3
Netlist is offline Netlist  Belgium
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From what I understand you’d like to regulate the secundaries of your transfos.
A variac is typically used to regulate the mains power supply.

/Hugo
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Old 14th March 2005, 12:26 PM   #4
dhole is offline dhole  United Kingdom
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I guess yeah I didnt understand the usage of the variac. It would be use full to connect it to the toroidal and bring its voltage up to mains level..... I have an idea of using it in replacement of a toroidal... not thinking straight.....
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Old 14th March 2005, 12:29 PM   #5
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Don't forget that a Variac is only an autotransformer, so there's no isolation.
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Old 14th March 2005, 01:10 PM   #6
Netlist is offline Netlist  Belgium
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Careful, I don't know your particular transformer but keep in mind that the output is almost sure AC. You can't use it as a DC source.
Take utmost care when dealing with AC mains voltage.

/Hugo
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Old 14th March 2005, 01:18 PM   #7
dhole is offline dhole  United Kingdom
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yeah I do know that..... I may be stupid but I do know that....
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Old 14th March 2005, 01:21 PM   #8
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yeah I do know that..... I may be stupid but I do know that....
Nothing to do with stupidity... It's just that all these posts are also read by others. We want to make sure that people don't get (wrong or dangerous) ideas and get themselves electrocuted.
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